Emergency sewage treatment system

Abstract

The utility model discloses an emergency sewage treatment system which comprises a pretreatment unit used for pretreating sewage and connected with a surpassing pipeline; the biological comprehensive pool is formed underground, is used for receiving wastewater treated by the pretreatment unit and comprises an aerobic zone and a settling zone which are arranged in parallel and are separated by a first enclosure assembly, the aerobic zone is connected to the pretreatment unit through a first pipeline, the water outlet end of the aerobic zone is communicated with the water inlet end of the settling zone, and an aeration mechanism is arranged in the aerobic zone; the settling zone is provided with a sludge suction mechanism; the EHBR tank is formed underground, the EHBR tank is connected to the settling zone through a second pipeline, the EHBR tank comprises a plurality of membrane reaction zones which are arranged in parallel and are separated by a second enclosure assembly, and a plurality of membrane assemblies are arranged in the membrane reaction zones; the tail water pump pool is formed underground and is communicated to the water outlet end of the EHBR pool, and a tail water pump is arranged in the tail water pump pool and is connected to the surpassing pipeline through a drainage pipe. The emergency sewage treatment system provided by the utility model is short in construction period and can be used as an advanced treatment unit subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an emergency sewage treatment system. Background Art

[0002] With the increase of urban population and the gradual increase of urban water demand and water consumption, the phenomenon of insufficient treatment capacity of municipal sewage treatment plants has become more and more obvious. The construction of sewage treatment plants takes a long time, and sewage overflow will occur during the construction period, especially during heavy rainstorms, the sewage overflow is serious.

[0003] The construction and expansion of traditional sewage treatment plants need to go through complex stages such as planning, design, and construction, with a long cycle, large investment, and it is difficult to cope with sudden peaks in sewage discharge. In the prior art, an integrated emergency sewage treatment device disclosed in Chinese Patent CN213266133U is generally used to conduct emergency treatment on sewage exceeding the treatment capacity of the sewage treatment plant, but its treatment water volume cannot meet the treatment requirements. Content of the Utility Model

[0004] The purpose of the utility model is to provide an emergency sewage treatment system, which cooperates with the existing pretreatment system to treat overflow sewage and can also be used as a deep treatment system of the sewage treatment plant later.

[0005] Based on the above problems, the technical solution provided by the utility model is:

[0006] An emergency sewage treatment system, comprising:

[0007] A pretreatment unit for preprocessing sewage, which is connected with a bypass pipeline;

[0008] A biological comprehensive pool formed underground for receiving the wastewater treated by the pretreatment unit, including an aerobic zone and a sedimentation zone arranged in parallel and separated by a first partition component. The aerobic zone is connected to the pretreatment unit through a first pipeline, the water outlet end of the aerobic zone is communicated with the water inlet end of the sedimentation zone, an aeration mechanism is arranged in the aerobic zone, and a sludge suction mechanism is arranged in the sedimentation zone;

[0009] An EHBR pool formed underground, the EHBR pool is connected to the sedimentation zone through a second pipeline, the EHBR pool includes a plurality of membrane reaction zones arranged in parallel and separated by a second partition component, and a plurality of membrane modules are arranged in the membrane reaction zones;

[0010] A tail water pump pool formed underground and communicated with the water outlet end of the EHBR pool, a tail water pump is arranged in the tail water pump pool, and the tail water pump is connected to the bypass pipeline through a drain pipe.

[0011] In some of these embodiments, the first partition assembly includes a plurality of fixed columns arranged vertically, a partition member, a weight member disposed at the lower end of the partition member, and a floating body disposed at the upper end of the partition member. The weight member and the floating body are both movably arranged on the fixed columns; the structure of the second partition assembly is the same as that of the first partition assembly.

[0012] In some of these embodiments, the weight member is connected with a first movable ring, and the floating body is connected with a second movable ring. The first movable ring and the second movable ring are sleeved on the fixed columns.

[0013] In some of these embodiments, the aeration mechanism includes a plurality of aeration discs. The plurality of aeration discs are connected to a first aeration fan through a first aeration pipeline assembly, and the plurality of membrane modules are connected to a second aeration fan through a second aeration pipeline assembly.

[0014] In some of these embodiments, the EHBR tank further includes a disinfection area communicated with the plurality of membrane reaction zones. An aeration assembly is arranged in the disinfection area. The aeration assembly is connected to the second aeration fan through a third aeration pipeline assembly. The disinfection area is also connected with a chemical addition pipeline.

[0015] In some of these embodiments, the sludge suction mechanism includes brackets arranged on both sides of the sedimentation area, sludge discharge troughs fixed on the side parts of the brackets, mounting frames slidably arranged on the brackets, a plurality of sludge suction pumps mounted on the mounting frames, and a plurality of sludge suction discs connected to the plurality of sludge suction pumps. The sludge suction pumps are connected to a sludge suction main pipe through sludge suction branch pipes, and the outlet of the sludge suction main pipe faces the sludge discharge trough.

[0016] In some of these embodiments, roller assemblies are respectively arranged on both sides of the bottom of the mounting frame. The roller assemblies include rollers and drive motors for driving the rollers to rotate. Guide rails matched with the rollers are arranged at the upper ends of the brackets.

[0017] In some of these embodiments, the sludge discharge trough is connected to the aerobic zone through a sludge return pipeline. The sludge return pipeline is connected to a sludge tank through a sludge pipe, and the sludge tank is connected to a sludge thickening tank through a sludge discharge pipe.

[0018] In some of these embodiments, a diversion wall is arranged at the water inlet end of the sedimentation area, and a plurality of diversion holes are arranged on the diversion wall.

[0019] In some of these embodiments, the pretreatment unit includes a coarse grille, a lift pump house, a fine grille, and a grit chamber arranged in sequence along the water inlet direction. A water distribution tank is arranged between the grit chamber and the biological comprehensive tank.

[0020] Compared with the prior art, the advantages of the present utility model are:

[0021] The emergency sewage treatment system utilizes the existing pretreatment units in the sewage treatment plant. The biological comprehensive tank and the EHBR tank therein can be rapidly deployed, and can conduct emergency treatment of sewage in case of emergencies such as sewage overflow and sewage treatment plant expansion. After reaching the discharge standard, it is discharged through the existing ultra-pipeline without the need to additionally set up a sewage outlet into the river. The construction period is short and the construction cost is low. When the emergency is eliminated, the emergency treatment system can also be used as a sewage advanced treatment system to maximize the utilization of resources. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. The drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the emergency sewage treatment system of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of a part of the embodiment of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the biological comprehensive tank in the embodiment of the present utility model;

[0026] Figure 4 It is Figure 3 the schematic diagram of the 1-1 section in

[0027] Figure 5 It is Figure 3 the schematic diagram of the 2-2 section in

[0028] Figure 6 It is Figure 5 the partial enlarged view at I in

[0029] Figure 7 It is one of the schematic structural diagrams of the first partition component in the embodiment of the present utility model;

[0030] Figure 8 It is the other schematic structural diagram of the first partition component in the embodiment of the present utility model;

[0031] Figure 9 It is the schematic structural diagram of the EHBR tank in the embodiment of the present utility model;

[0032] Wherein:

[0033] 1. Biological comprehensive pool; 1-1. Aerobic zone; 1-2. Sedimentation zone; 1-2a. Diversion wall; 1-2a1. Diversion hole; 2. EHBR pool; 2-1. Membrane reaction zone; 2-2. Disinfection zone; 2-2a. Aeration component; 3. Aeration mechanism; 3-1. Aeration disc; 4. Mud suction mechanism; 4-1. Bracket; 4-2. Mounting frame; 4-3. Roller; 4-4. Driving motor; 4-5. Guide rail; 4-6. Mud outlet trough; 4-7. Mud suction disc; 4-8. Mud suction pump; 5. First partition component; 5-1. Fixed column; 5-2. Partition part; 5-3. Counterweight part; 5-4. Floating body; 5-5. First movable ring; 5-6. Second movable ring; 6. Membrane component; 7. Second partition component; 8. First aeration pipeline component; 9. First aeration fan; 10. Second aeration pipeline component; 11. Second aeration fan; 12. Chemical dosing pipeline; 13. Chemical dosing equipment; 14. Sludge return pipe; 15. Tail water pump pool; 16. Sludge pool; 17. Sludge thickening pool; 18. First pipeline; 19. Second pipeline; 20. Drain pipe; 21. Tail water pump; 22. Third aeration pipeline component; 23. Mud discharge pipe;

[0034] 100. Pretreatment unit; 101. Coarse grille; 102. Lift pump house; 103. Fine grille; 104. Sand basin; 200. Innocuous treatment workshop; 300. Bypass pipeline; 400. Distribution tank. Specific embodiments

[0035] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present invention and not for limiting the scope of the present invention. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually those in conventional experiments.

[0036] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides an emergency sewage treatment system, which includes a pretreatment unit 100, a biological comprehensive pool 1, an EHBR pool 2, and a tail water pump pool 15 arranged in sequence.

[0037] The pretreatment unit 100 is used to pretreat sewage and is an existing structure in the sewage treatment plant, including a coarse grille 101, a lift pump house 102, a fine grille 103, and a sand basin 104 arranged in sequence. Among them, the sand basin 104 is a vortex sand basin. In order to facilitate the adjustment of water quality and water volume, a distribution tank 400 is provided between the pretreatment unit 100 and the biological comprehensive pool 1.

[0038] The biological comprehensive pool 1 is formed underground by excavating soil to obtain a pool body, and is used to receive the wastewater treated by the pretreatment unit 100. As Figures 3 to 5As shown in the figure, it includes an aerobic zone 1-1 and a sedimentation zone 1-2 which are arranged in parallel and separated by a first partition assembly 5. The aerobic zone 1-1 is connected to a pretreatment unit 100 through a first pipeline 18. The water outlet end of the aerobic zone 1-1 is communicated with the water inlet end of the sedimentation zone 1-2. Specifically, it can be achieved by adjusting the height of the first partition assembly 5. An aeration mechanism 3 is provided in the aerobic zone 1-1, and a sludge suction mechanism 4 is provided in the sedimentation zone 1-2. In order to prevent sewage leakage, the bottoms of the aerobic zone 1-1 and the sedimentation zone 1-2 are treated with anti-seepage and a thin cement layer is poured, without a large amount of pouring and with a short construction period.

[0039] As Figure 7 and Figure 8 shown in the figure, the first partition assembly 5 includes a plurality of fixed columns 5-1 arranged vertically, a partition member 5.2, a counterweight member 5-3 provided at the lower end of the partition member 5-2, and a floating body 5-4 provided at the upper end of the partition member 5-3. The counterweight member 5-3 and the floating body 5-4 are both movably arranged on the fixed column 5-1. The partition member 5-3 is an impermeable partition, and a PVC curtain can be used. The counterweight member 5-3 can use sandbags, and the floating body 5-4 can float on the water surface. The fixed column 5-1 is a galvanized steel pipe, and its bottom is poured together with a concrete pier. The lower end of the partition member 5-3 is kept below the water surface through the counterweight member 5-3, and the upper end of the partition member 5-3 floats to the water surface through the floating body 5-4, so as to form an impermeable partition wall in the water body.

[0040] Specifically, the counterweight member 5-3 is connected with a first movable ring 5-5, and the floating body 5-4 is connected with a second movable ring 5-6. Both the first movable ring 5-5 and the second movable ring 5-6 are sleeved on the fixed column 5-1. This structure facilitates the installation and disassembly of the partition member 5-2 and improves the construction efficiency.

[0041] The aeration mechanism 3 includes a plurality of aeration discs 3-1. The plurality of aeration discs 3-1 are connected to a first aeration fan 9 through a first aeration pipeline assembly 8. The aeration discs 3-1 are supported on the bottom of the aerobic zone 1-1 through support legs. The first aeration pipeline assembly 8 includes aeration branch pipes connected to each aeration disc 3-1 and an aeration main pipe connecting the plurality of aeration branch pipes. The aeration main pipe is connected to the first aeration fan 9.

[0042] The sedimentation zone 1-2 adopts a horizontal flow sedimentation process. In order to improve the sedimentation effect, a diversion wall 1-2a is provided at the water inlet end of the sedimentation zone 1-2, and a plurality of diversion holes 1-2a1 are provided on the diversion wall 1-2a. The diversion holes 1-2a1 can be square.

[0043] As Figure 6As shown in the figure, the sludge suction mechanism 4 includes brackets 4-1 arranged on both sides of the sedimentation area 1-2, sludge discharge troughs 4-6 fixed to the side parts of the brackets 4-1, mounting frames 4-2 slidably arranged on the brackets 4-1, a plurality of sludge suction pumps 4-8 mounted on the mounting frames 4-2, and a plurality of sludge suction discs 4-7 connected to the plurality of sludge suction pumps 4-8. The sludge suction pumps 4-8 are connected to a sludge suction main pipe through sludge suction branch pipes, and the sludge discharge port of the sludge suction main pipe faces the sludge discharge trough 4-6. The sludge at the bottom of the sedimentation area 1-2 is sucked to the sludge discharge trough 4-6 for discharge through the cooperation of the sludge suction pumps 4-8 and the sludge suction discs 4-7. By moving the mounting frame 4-2 to different positions, the sludge at different positions at the bottom of the sedimentation area 1-2 can be sucked.

[0044] To facilitate the movement of the sludge suction disc 4-7 in the sedimentation area 1-2, roller assemblies are respectively arranged on both sides of the bottom of the mounting frame 4-2. The roller assemblies include rollers 4-3 and drive motors 4-4 that drive the rollers 4-3 to rotate. Guide rails 4-5 matching the rollers 4-3 are arranged at the upper ends of the brackets 4-1. By driving the rollers 4-3 to rotate through the drive motors 4-4, the mounting frame 4-2 is driven to move along the guide rails 4-5, thereby driving the sludge suction pumps 4-8 and the sludge suction discs 4-7 to move in the sedimentation area 1-2 to achieve the discharge of sludge.

[0045] To facilitate the return of the sludge in the sedimentation area 1-2 to the aerobic area 1-1, the sludge discharge trough 4-6 is connected to the aerobic area 1-1 through a sludge return pipe 14. The sludge return pipe 14 is also connected to a sludge pool 16 through a sludge pipe. The sludge pool 16 is connected to a sludge thickening tank 17 through a sludge discharge pipe 23 to perform thickening treatment on the sludge. The sludge after thickening treatment is transported out after being treated in a sludge harmless workshop 200.

[0046] The EHBR pool 2, that is, the enhanced coupled biofilm reactor, is formed underground. The pool body is obtained by excavating the soil underground, and then anti-seepage treatment is carried out at the bottom of the pool body and a thin cement layer is poured. The EHBR pool 2 is connected to the sedimentation area 1-2 through a second pipeline 19, as Figure 9 shown, the EHBR pool 2 includes a plurality of membrane reaction zones 2-1 arranged in parallel and separated by a second partition assembly 7. A number of membrane modules 6 are arranged in the membrane reaction zones 2-1, and the membrane modules 6 are aerobic biofilm modules. The structure of the second partition assembly 6 is the same as that of the first partition assembly 5.

[0047] To facilitate the disinfection and external discharge of the wastewater treated by the enhanced coupled biofilm reactor, the EHBR pool 2 further includes a disinfection area 2-2 communicated with the plurality of membrane reaction zones 2-1. An aeration assembly 2-2a is arranged in the disinfection area 2-2. The aeration assembly 2-2a is connected to a second aeration fan 11 through a third aeration pipeline assembly 22. The disinfection area 2-2 is also connected to a chemical addition pipeline 12. The chemical addition pipeline 12 is connected to a chemical addition device 13. Disinfectant is introduced into the disinfection area 2-2 through the chemical addition pipeline 12, and at the same time, the aeration assembly 2-2a can ensure that the medicament is in full contact with the water body.

[0048] The tail water pump sump 15 is formed underground and connected to the disinfection area 2-2 of the EHBR tank 2. A tail water pump 21 is installed in the tail water pump sump 15. The tail water pump 21 is connected to the bypass pipeline 300 through a drain pipe 20. The tail water enters the receiving water body through the bypass pipeline 300 of the original sewage treatment plant, eliminating the need for a new sewage discharge outlet and avoiding the extension of the construction period caused by the approval of the sewage discharge outlet setting.

[0049] The above emergency sewage treatment system is used to treat 30,000 m 3 / d of sewage. According to the average influent and effluent water quality of the system and the effluent water quality, the reduction amount of pollutants is calculated. COD and NH3-N can be reduced by 4740 kg / d and 450 kg / d respectively every day (calculated based on the influent COD and NH3-N being 200 and 20 mg / L respectively). The specific parameters are shown in Table 1.

[0050] Table 1 Pollutant reduction amount of emergency sewage pretreatment

[0051] Item COD <![CDATA[NH3-N]]> Inlet Concentration (mg / L) 200 20 Outlet Concentration (mg / L) 42 5 Reduction Amount (kg / d) 4740 450

[0052] After the emergency situation that requires emergency treatment is eliminated, through reconstruction measures such as adding pipelines, the effluent of the original sewage treatment plant is discharged into the emergency treatment system, that is, the effluent of the original sewage treatment plant is discharged into the biological comprehensive tank and subsequent treatment units to achieve in-depth treatment of sewage and optimize the effluent water quality of the sewage treatment plant.

[0053] In summary, the emergency sewage treatment system can achieve rapid deployment, short construction period, low construction cost, can be used for the treatment of a large amount of sewage, meet the discharge requirements for the emergency treatment of sewage, and can also be used as a sewage in-depth treatment system to maximize the utilization of resources.

[0054] The above examples are only for explaining the technical concept and characteristics of the present invention, and are intended to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and should not be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An emergency sewage treatment system, characterized in that: include: A pretreatment unit, used for pre-treating sewage, connected with a bypass pipe; A biological integrated pool, which is formed underground and is used to receive wastewater treated by the pretreatment unit, comprising an aerobic zone and a sedimentation zone arranged in parallel and separated by a first enclosure component, wherein the aerobic zone is connected to the pretreatment unit via a first pipeline, the water outlet of the aerobic zone is connected to the water inlet of the sedimentation zone, an aeration mechanism is provided in the aerobic zone, and a sludge suction mechanism is provided in the sedimentation zone; An EHBR pool is formed underground, the EHBR pool is connected to the precipitation zone via a second pipeline, the EHBR pool comprises a plurality of membrane reaction zones arranged in parallel and separated by a second enclosure assembly, and a plurality of membrane assemblies are arranged in the membrane reaction zones; A tailwater pump pool is formed underground and connected to the water outlet of the EHBR pool. A tailwater pump is arranged in the tailwater pump pool, and the tailwater pump is connected to the surpassing pipeline via a drainage pipe.

2. The emergency sewage treatment system according to claim 1, characterized in that: The first enclosure assembly includes a plurality of vertically arranged fixed columns, an enclosure component, a counterweight component arranged at the lower end of the enclosure component, and a floating body arranged at the upper end of the enclosure component. The counterweight component and the floating body are movably arranged on the fixed columns. The structure of the second enclosure assembly is the same as that of the first enclosure assembly.

3. The emergency sewage treatment system according to claim 2, characterized in that: The counterweight component is connected with a first movable ring, the floating body is connected with a second movable ring, and the first movable ring and the second movable ring are sleeved on the fixing column.

4. The emergency sewage treatment system according to claim 1, characterized in that: The aeration mechanism comprises a plurality of aeration plates, wherein the plurality of aeration plates are connected to a first aeration fan via a first aeration pipeline assembly, and the plurality of membrane assemblies are connected to a second aeration fan via a second aeration pipeline assembly.

5. The emergency sewage treatment system according to claim 4, characterized in that: The EHBR pool also includes a disinfection zone connected to the multiple membrane reaction zones. An aeration component is arranged in the disinfection zone. The aeration component is connected to the second aeration fan via a third aeration pipeline component. The disinfection zone is also connected to a dosing pipeline.

6. The emergency sewage treatment system according to claim 1, characterized in that: The mud suction mechanism includes brackets arranged on both sides of the sedimentation area, a mud outlet trough fixed on the side of the bracket, a mounting frame slidably arranged on the bracket, a plurality of mud suction pumps installed on the mounting frame, and a plurality of mud suction plates connected to the plurality of mud suction pumps. The mud suction pumps are connected to a mud suction main pipe via mud suction branch pipes, and the mud outlet of the mud suction main pipe faces the mud outlet trough.

7. The emergency sewage treatment system according to claim 6, characterized in that: Roller assemblies are respectively arranged on both sides of the bottom of the mounting frame, and the roller assemblies include rollers and a driving motor for driving the rollers to rotate. A guide rail matching the rollers is arranged on the upper end of the bracket.

8. The emergency sewage treatment system according to claim 6, characterized in that: The sludge outlet trough is connected to the aerobic zone via a sludge return pipe, the sludge return pipe is connected to a sludge pool via a sludge pipe, and the sludge pool is connected to a sludge thickening tank via a sludge discharge pipe.

9. The emergency sewage treatment system according to claim 1, characterized in that: A guide wall is provided at the water inlet end of the sedimentation zone, and a plurality of guide holes are provided on the guide wall.

10. The emergency sewage treatment system according to claim 1, characterized in that: The pretreatment unit comprises a coarse screen, a lifting pump room, a fine screen and a grit chamber which are sequentially arranged along the water inlet direction, and a water distribution tank is arranged between the grit chamber and the biological integrated tank.

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